//
//  NSObject+SayHello.h
//  08-类的拓展
//
//  Created by dllo on 16/7/13.
//  Copyright © 2016年 dllo. All rights reserved.
//

#import <Foundation/Foundation.h>
// 类的声明
//@interface Person :NSObject

//类目

//@interface Person  (category name)



@interface NSObject (SayHello)


- (void)sayHello;
    


@end
